6:02 PM,
Jun. 15, 2013

Written by

Edward C. Baig
USA TODAY

At the start of Apple's Worldwide Developer's Conference on Monday, I was among a throng of journalists racing for the limited rows of seats with power strips. Try explaining to an editor that you ran out of juice in the middle of CEO Tim Cook's presentation.

A less frenzied but no less important chase for the few available power outlets is a common ritual at airports, lest you board a cross-country plane with no options for plugging in.

Suffice to say. battery power is a precious resource that we all can relate to, whether using a laptop in a boardroom, classroom or at 35,000 feet. Those of us who use ...